(1978). Geological Survey Research 1978: A summary of recent significant scienctific and econonic results accompanied by a list of geologic and hydrologic investigations in progress and a report on the status of topgraphic mapping. U.S. Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Geological Survey Research 1978: A Summary of Recent Significant Scienctific and Econonic Results Accompanied by a List of Geologic and Hydrologic Investigations in Progress and a Report on the Status of Topgraphic Mapping. Washington: U.S. Gov. Print. Off, 1978.
MLA-Zitierstil (9. Ausg.)Geological Survey Research 1978: A Summary of Recent Significant Scienctific and Econonic Results Accompanied by a List of Geologic and Hydrologic Investigations in Progress and a Report on the Status of Topgraphic Mapping. U.S. Gov. Print. Off, 1978.